netdev - Re: [PATCH bpf-next 03/12] net: Add IFLA_XDP_EGRESS for XDP programs in the egress path

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Date:   Sun, 2 Feb 2020 10:48:50 -0700
From:   David Ahern <dsahern@...il.com>
To:     Toke Høiland-Jørgensen <toke@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Jesper Dangaard Brouer <jbrouer@...hat.com>
Cc:     David Ahern <dsahern@...nel.org>, netdev@...r.kernel.org,
        prashantbhole.linux@...il.com, jasowang@...hat.com,
        davem@...emloft.net, mst@...hat.com, toshiaki.makita1@...il.com,
        daniel@...earbox.net, john.fastabend@...il.com, ast@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com, andriin@...com,
        David Ahern <dahern@...italocean.com>
Subject: Re: [PATCH bpf-next 03/12] net: Add IFLA_XDP_EGRESS for XDP programs
 in the egress path

On 2/1/20 9:03 AM, Toke Høiland-Jørgensen wrote:
> I think it would be weird and surprising if it *doesn't* see packets
> from the stack. On RX, XDP sees everything; the natural expectation
> would be that this was also the case on TX, no?
> 

Yes. XDP_EGRESS should be symmetrical with XDP on the Rx side.